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Pension and Other Postretirement Benefit Plans | 9 Months Ended
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Sep. 30, 2018
Compensation And Retirement Disclosure [Abstract] |
Pension and Other Postretirement Benefit Plans | 12. Pension and Other Postretirement Benefit Plans Net pension cost for the Schlumberger pension plans included the following components:
(Stated in millions) |  |
| Third Quarter |  |  | Nine Months |  |
| 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |  |
| US |  |  | Int'l |  |  | US |  |  | Int'l |  |  | US |  |  | Int'l |  |  | US |  |  | Int'l |  |
Service cost | $ | 14 |  |  | $ | 35 |  |  | $ | 14 |  |  | $ | 24 |  |  | $ | 44 |  |  | $ | 105 |  |  | $ | 44 |  |  | $ | 71 |  |
Interest cost |  | 41 |  |  |  | 77 |  |  |  | 44 |  |  |  | 76 |  |  |  | 125 |  |  |  | 229 |  |  |  | 131 |  |  |  | 230 |  |
Expected return on plan assets |  | (61 | ) |  |  | (149 | ) |  |  | (60 | ) |  |  | (135 | ) |  |  | (186 | ) |  |  | (442 | ) |  |  | (181 | ) |  |  | (406 | ) |
Amortization of prior service cost |  | 3 |  |  |  | 3 |  |  |  | 3 |  |  |  | 24 |  |  |  | 9 |  |  |  | 8 |  |  |  | 9 |  |  |  | 73 |  |
Amortization of net loss |  | 12 |  |  |  | 35 |  |  |  | 10 |  |  |  | 30 |  |  |  | 36 |  |  |  | 105 |  |  |  | 29 |  |  |  | 90 |  |
| $ | 9 |  |  | $ | 1 |  |  | $ | 11 |  |  | $ | 19 |  |  | $ | 28 |  |  | $ | 5 |  |  | $ | 32 |  |  | $ | 58 |  |
The net periodic benefit credit for the Schlumberger US postretirement medical plan included the following components:
(Stated in millions) |
| Third Quarter |  |  | Nine Months |
| 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Service cost | $ | 8 |  |  | $ | 7 |  |  | $ | 24 |  |  | $ | 22 |
Interest cost |  | 11 |  |  |  | 12 |  |  |  | 33 |  |  |  | 35 |
Expected return on plan assets |  | (15 | ) |  |  | (16 | ) |  |  | (47 | ) |  |  | (46 | )
Amortization of prior service credit |  | (7 | ) |  |  | (7 | ) |  |  | (21 | ) |  |  | (22 | )
| $ | (3 | ) |  | $ | (4 | ) |  | $ | (11 | ) |  | $ | (11 | )

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- References No definition available. + Details
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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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